{"id":1900,"date":"2021-02-25T05:13:18","date_gmt":"2021-02-24T21:13:18","guid":{"rendered":"https:\/\/www.pyrazoles-derivatives.com\/?p=1900"},"modified":"2021-02-25T05:13:18","modified_gmt":"2021-02-24T21:13:18","slug":"continuously-updated-synthesis-method-about-31037-02-2-2","status":"publish","type":"post","link":"https:\/\/www.pyrazoles-derivatives.com\/?p=1900","title":{"rendered":"Continuously updated synthesis method about 31037-02-2"},"content":{"rendered":"

Application of 31037-02-2<\/a>,Some common heterocyclic compound, 31037-02-2, name is Ethyl 5-amino-1-methyl-1H-pyrazole-4-carboxylate, molecular formula is C7H11N3O2, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.<\/p>\n

EXAMPLE 69 Preparation of ethyl 4-Hydroxy-1-methyl-6-oxo-6,7-dihydro-1H-pyrazolo-[3,4-b]pyridine-5-carboxylate A solution of sodium metal (12.7 g, 0.55 mol) in ethanol is treated at room temperature with ethyl 5-amino-1-methyl-4-pyrazolecarboxylate (25 g, 0.148 mol), stirred for 0.5 h, treated dropwise with a solution of diethyl malonate (80 ML, 0.52 mol in ethanol over a 0.5 h period, heated at reflux temperature for 56 h, cooled to room temperature, diluted with water, washed with ethyl acetate, acidified to PH 2 with HCl and filtered.The filtercake is washed sequentially with water, ethanol, ethyl acetate and toluene and dried in vacuo at 40 C. for 16 h to afford the title product as a white solid, 28.7 g (82% yield), identified by HNMR analysis.<\/p>\n

The synthetic route of 31037-02-2 has been constantly updated, and we look forward to future research findings.<\/p>\n","protected":false},"excerpt":{"rendered":"

The synthetic route of 31037-02-2 has been constantly updated, and we look forward to future research findings.<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[183,131],"tags":[126],"class_list":["post-1900","post","type-post","status-publish","format-standard","hentry","category-31037-02-2","category-pyrazoles-derivatives","tag-m-w100-200"],"yoast_head":"\nContinuously updated synthesis method about 31037-02-2<\/title>\n<meta name=\"description\" content=\"Application of 31037-02-2,Some common heterocyclic compound, 31037-02-2, name is Ethyl 5-amino-1-methyl-1H-pyrazole-4-carboxylate, molecular formula is C7H11N3O2, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/www.pyrazoles-derivatives.com\/?p=1900\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Continuously updated synthesis method about 31037-02-2\" \/>\n<meta property=\"og:description\" content=\"Application of 31037-02-2,Some common heterocyclic compound, 31037-02-2, name is Ethyl 5-amino-1-methyl-1H-pyrazole-4-carboxylate, molecular formula is C7H11N3O2, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.\" \/>\n<meta property=\"og:url\" content=\"http:\/\/www.pyrazoles-derivatives.com\/?p=1900\" \/>\n<meta property=\"og:site_name\" content=\"pyrazoles-derivatives\" \/>\n<meta property=\"article:published_time\" content=\"2021-02-24T21:13:18+00:00\" \/>\n<meta name=\"author\" content=\"Jessica.F\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jessica.F\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"http:\/\/www.pyrazoles-derivatives.com\/?p=1900\",\"url\":\"http:\/\/www.pyrazoles-derivatives.com\/?p=1900\",\"name\":\"Continuously updated synthesis method about 31037-02-2\",\"isPartOf\":{\"@id\":\"http:\/\/www.pyrazoles-derivatives.com\/#website\"},\"datePublished\":\"2021-02-24T21:13:18+00:00\",\"author\":{\"@id\":\"http:\/\/www.pyrazoles-derivatives.com\/#\/schema\/person\/d9a9f27bed675392c6f363a01ffd49f1\"},\"description\":\"Application of 31037-02-2,Some common heterocyclic compound, 31037-02-2, name is Ethyl 5-amino-1-methyl-1H-pyrazole-4-carboxylate, molecular formula is C7H11N3O2, traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc, below Introduce a new synthetic route.\",\"breadcrumb\":{\"@id\":\"http:\/\/www.pyrazoles-derivatives.com\/?p=1900#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"http:\/\/www.pyrazoles-derivatives.com\/?p=1900\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"http:\/\/www.pyrazoles-derivatives.com\/?p=1900#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u9996\u9875\",\"item\":\"http:\/\/www.pyrazoles-derivatives.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Continuously updated synthesis method about 31037-02-2\"}]},{\"@type\":\"WebSite\",\"@id\":\"http:\/\/www.pyrazoles-derivatives.com\/#website\",\"url\":\"http:\/\/www.pyrazoles-derivatives.com\/\",\"name\":\"pyrazoles-derivatives\",\"description\":\"Several pyrazole derivatives possess important pharmacological activities and they have been proved useful materials in drug research. 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